Jasson Casey wrote:
> I've been going back through the RFC(s) and have a
> question.
>
> Requests can illegally loop or legitimately spiral. My
> current understanding is that an illegal loop is
> present when there is a corresponding via entry
> already in the via stack, and the message has a
> similar vector as with the previous via entry.
>
> What does Loop detection accomplish that cannot be
> accomplished with the Max-Forwards field?
Indeed, a fine question, and the source of Open Issue #407, which
proposes to deprecate loop detection in favor of max-forwards.
Loop detection has the benefit of detecting loops immediately, whereas
with Max-Forwards, they can loop around a few times till the counter
hits zero. However, I believe experience has shown us that the
complexities of detecting a loop vs. a legitimate spiral are
substantial, and the small imporvement in performance it provides is not
worth the cost.
There has been little comment on the proposal to deprecate loop
detection; one email in favor, and a few questions. Without any
additional comment it will be removed from bis-06.
Thanks,
Jonathan R.
--
Jonathan D. Rosenberg, Ph.D. 72 Eagle Rock Avenue
Chief Scientist First Floor
dynamicsoft East Hanover, NJ 07936
[EMAIL PROTECTED] FAX: (973) 952-5050
http://www.jdrosen.net PH: (973) 952-5000
http://www.dynamicsoft.com
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